XPrintServer/XPrint.Image/Tools/ChannelImageTool.cs

using HPPH;
using ImageMagick;
using ImageMagick.Formats;
using Pipelines.Sockets.Unofficial.Arenas;
using SixLabors.ImageSharp.PixelFormats;
using System.Drawing;
using System.Drawing.Imaging;
using System.Text;
using System.Threading.Tasks;

namespace XPrint.Image.Tools
{
    public class ChannelImageTool
    {

        /// <summary>
        /// 分色接口
        /// </summary>
        /// <param name="inputPath">输入图片路径</param>
        /// <param name="outputPath">输出图片路径</param>
        /// <param name="iccProfileName">icc名称</param>
        /// <param name="iccProfilePath">icc文件路径</param>
        public static void SplitColor(string inputPath, string outputPath, string iccProfilePath = "")
        {
            using (var image = new MagickImage(inputPath)
            {
                ColorSpace = ColorSpace.sRGB // 若需与 CMYK 工作流对接，改为 CMYK 并与源一致
            })
            {
                //var profileBim1 = image.Get8BimProfile();
                //if (profileBim1 != null)
                //{
                //    var data = profileBim1.ToByteArray();
                //    File.WriteAllBytes(@"D:\8bim_white_channel", data);
                //}


                // 配置大端字节序
                var writeSettings = new TiffWriteDefines();
                writeSettings.Endian = Endian.MSB;//大端模式，兼容性好些
                image.Alpha(AlphaOption.On);
                image.MetaChannelCount = 0;

                ushort[] area;
                var pixels = image.GetPixels();
                var areaAlpha = pixels.GetArea(0, 0, image.Width, image.Height)!;

                image.Alpha(AlphaOption.Off);
                image.MetaChannelCount = 1;

                var pixels2 = image.GetPixels();

                area = pixels2.GetArea(0, 0, image.Width, image.Height)!;
                // 遍历每个像素，根据Alpha值设置White通道
                for (int i = 0; i < areaAlpha.Length; i += 4)
                {
                    // 获取原始图像的Alpha值
                    ushort alpha = areaAlpha[i + 3];

                    var r = area[i];
                    var g = area[i + 1];
                    var b = area[i + 2];

                    // 2. 计算白色墨量：通过RGB值计算灰度值（灰度越高，白色墨量越多）
                    // 公式：gray = 0.299*R + 0.587*G + 0.114*B（适配16位范围）
                    double grayValue = 0.299 * r + 0.587 * g + 0.114 * b;
                    ushort whiteInkAmount = (ushort)Math.Clamp(grayValue, 0, 65535);  // 确保在0~65535范围内

                    // 3. 黑色填充深度 = 白色墨量（墨量越多，黑色越深）
                    // 将白色墨量直接映射到目标通道（i+4），值越高表示黑色越深
                    area[i + 3] = whiteInkAmount;
                }

                pixels2.SetPixels(area);



                string bimFileName = "8bim_white_channel";
                var bimData = File.ReadAllBytes(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, $"assets/{bimFileName}"));
                var profileBim = new EightBimProfile(image, bimData);

                //image.Alpha(AlphaOption.Remove);
                profileBim.SetExifProfile(image.GetExifProfile());
                profileBim.SetIptcProfile(image.GetIptcProfile());
                profileBim.SetXmpProfile(image.GetXmpProfile());
                image.SetProfile(profileBim);

                profileBim.GetExifProfile()?.CreateThumbnail();

                image.Settings.Compression = CompressionMethod.LZW;
                image.SetCompression(CompressionMethod.LZW);//LZW压缩避免竖线问题
                                                            //writeSettings.Alpha = TiffAlpha.Associated;
                                                            // 保存
                                                            // 4. 保存结果
                image.Write(outputPath);
                Console.WriteLine($"填充完成，结果已保存至：{outputPath}");
                //}

                //var profileBim = image.Get8BimProfile()!;
                //profileBim.GetExifProfile()?.RemoveThumbnail();
                //File.WriteAllBytes(@$"D:\{bimFileName}", profileBim.ToByteArray());

                //if (bimProfile != null)
                //{
                //    var exifProfile = bimProfile.GetExifProfile();
                //    var xmpProfile = bimProfile.GetXmpProfile();
                //    var iptcProfile = bimProfile.GetIptcProfile();

                //    profileBim.SetExifProfile(exifProfile);
                //    profileBim.SetIptcProfile(iptcProfile);
                //    profileBim.SetXmpProfile(xmpProfile);
                //}


                //image.Compose = CompositeOperator.Overlay;

                //var channelNames = new Dictionary<int, string>
                //{
                //    { 0, "C" },  // 假设通道索引1对应红色
                //    { 1, "M" },
                //    { 2, "Y" },
                //    { 3, "K" },
                //    { 4, "A" },
                //    { 5, "W" }
                //};

                //TiffModifier.RenameCustomChannels(@"D:\2.tiff", Path.Combine(Path.GetDirectoryName(outputPath)!, "3.tif"), channelNames);
                // 创建包含 4 个自定义通道的图像
                //using (System.Drawing.Image imageA = new Bitmap(new MemoryStream(image.ToByteArray())))
                //{
                //    var items = imageA.PropertyItems;
                //}
            }
        }

        //private static string AddCustomXmpChannelName(string xmpXml, string channelName)
        //{
        //    // 注意：此方法需要根据实际 XMP 结构和命名空间调整
        //    // 示例：添加自定义命名空间 "mychannel"
        //    if (!xmpXml.Contains("xmlns:mychannel"))
        //    {
        //        xmpXml = xmpXml.Replace("<rdf:RDF",
        //            "<rdf:RDF xmlns:mychannel=\"http://example.com/channel/\"");
        //    }

        //    // 添加或更新 ChannelName 属性
        //    string channelProperty = $"<mychannel:ChannelName>{channelName}</mychannel:ChannelName>";
        //    int insertPos = xmpXml.IndexOf("</rdf:RDF>");
        //    if (insertPos > 0)
        //    {
        //        xmpXml = xmpXml.Insert(insertPos, channelProperty);
        //    }

        //    return xmpXml;
        //}


        //public static void GenerateMultiPageCmykTiff(MagickImage[] imagePages, string outputPath)
        //{
        //    using (var images = new MagickImageCollection())
        //    {
        //        for (int i = 0; i < imagePages.Length; i++)
        //        {
        //            //设置dpi
        //            //imagePages[i].Density = new Density(300.00, 300.00);
        //            images.Add(imagePages[i]);
        //        }


        //        // 配置大端字节序
        //        var writeSettings = new WriteTiffBigEndianDefines();

        //        // 保存多页
        //        images.Write(outputPath, writeSettings);
        //    }
        //}
    }
}